Detail lost when cycles baking to texture
Your problem is that your UVs in their present state are really bad for baking. This may seem to work for your other texture, but the UVs are heavily distorted in the main body area where you noticed the issue.



You can use "Smart UV Project" to get a decent set of baking UVs so that you don't need to waste time on it (make it a new UV so as not to overwrite the old one).



Here is a quick bake and the results in texture mode: